KR101783241B1 - Hybrid power quality improving device with high-efficiency energy-saving - Google Patents

Abstract

The present invention relates to a high-efficiency power saving hybrid electric quality improving apparatus, comprising: a power supply system having a three-phase power source of R phase, S phase and T phase and a neutral line (N phase) of a power supply system; (LOAD SYSTEM # 1, # 2) connected to the R phase, the S phase, the T phase and the neutral line (N phase), and any one of the R phase, S phase, Phase load (LOAD SYSTEM # 3, # 4, # 5) connected to the load side (N phase); A high efficiency power saving hybrid electric quality improving apparatus 100 connected to the R phase, the S phase, the T phase, and the neutral line (N phase); The high efficiency energy saving hybrid electric quality improvement apparatus 100 includes a first leg 110, a second leg 120, and a third leg 130 and a coil 150; The coil 150 is wound around one end of the first leg 110, one end of the second leg 120 and one end of the third leg 130, (151); And a second winding 152 wound around the other end of the first leg 110, the other end of the second leg 120 and the other end of the third leg 130, ); One end of the first winding 151 is connected to the R phase, S phase, and T, and one end of the first winding 151 is connected to the R phase, the S phase, and the T phase. And the other end of the first winding 151 is connected to the neutral point M; One end of the second winding 152 is connected to the neutral point M and the other end of the second winding 152 is connected to the neutral line N; The harmonic elimination, unbalance improvement, and phase open are generated through the connection of the first winding 151 and the second winding 152 of the high efficiency power saving hybrid electric quality improvement apparatus 100, Power hybrid type electric power quality improvement device.

Description

[0001] HYBRID POWER QUALITY IMPROVING DEVICE WITH HIGH-EFFICIENCY ENERGY-SAVING [0002]

The present invention relates to a high efficiency power saving hybrid electric quality improvement apparatus, and more particularly, to a high efficiency power saving hybrid electric power quality improvement apparatus which eliminates harmonics, improves unbalance, supplies normal power even during image formation, To a power saving hybrid electric quality improvement apparatus.

Harmonics are generated due to the increase in the use of nonlinear loads such as power converters, rotary devices and office equipment, and unbalance occurs due to the combination of single-phase loads and three-phase loads, so that power devices such as transformers, cables and capacitors are overheated or burned, Causing the device to malfunction, resulting in lower power quality and increased power costs due to power loss.

In order to improve this, a zigzag transformer is installed between the phase line and the neutral line, and the zigzag transformer has a reduced image minute impedance, so that harmonics are removed from the power system by preventing the image minute harmonic current from flowing.

As an electrical quality improvement apparatus using a zig-zag transformer, there are disclosed in Patent Registration No. 10-0685289 (hereinafter abbreviated as "Prior Art 1") and Patent No. 10-1398596 (hereinafter abbreviated as "Prior Art 2") .

Fig. 1 is a circuit diagram and a vector diagram of Prior Art 1, and Fig. 2 is a circuit diagram and a vector diagram of Prior Art 2. Fig.

In the disclosed prior art 1, an open delta connection part (third winding) is further added to the zigzag connection part (first winding and second winding) so that the image harmonic current does not flow to the power supply system.

In addition, in the disclosed prior art 2, a third winding is added to the first winding and the second winding to remove harmonics and improve unbalance.

However, although the above-described conventional techniques have an advantage of eliminating harmonics and improving the unbalance to some extent, the unbalance compensation is not properly performed, and the third winding must be additionally provided.

10-0685289 10-1398596

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a high-efficiency power saving hybrid electric quality improvement apparatus for eliminating harmonics.

Another object of the present invention is to provide a high-efficiency power saving hybrid electric quality improvement apparatus which improves unbalance.

Another object of the present invention is to provide a high-efficiency power saving hybrid electric quality improving apparatus capable of supplying normal power even when an image is formed.

Another object of the present invention is to provide a high-efficiency power saving hybrid electric quality improving apparatus that improves power quality and reduces power cost.

Another object of the present invention is to provide a high-efficiency power saving hybrid electric quality improvement apparatus which can be flexibly manufactured in single phase and three phases.

According to an aspect of the present invention, A second leg; A third leg; And a coil; Wherein the coil includes: a first winding wound on one end of the first leg, one end of the second leg, and one end of the third leg; And a second winding wound on the other end of the first leg, the other end of the second leg, and the other end of the third leg; Wherein the first winding has a phase line for connecting the ends in different phases and the other end is a neutral point, wherein the second winding has one end connected to the neutral point, the other end connected to the neutral point, And the first winding and the second winding are coupled in a direction in which the magnetic fluxes cancel each other.

Further, the first winding is wound around the first leg to the third leg in parallel, and the second winding is wound on the first leg to the third leg in series. do.

According to the present invention as described above, it is possible to provide a high-efficiency power saving hybrid electric quality improving device for eliminating harmonics.

In addition, according to the present invention, it is possible to provide a high-efficiency power saving hybrid electric quality improving apparatus which improves imbalance.

Further, according to the present invention, it is possible to provide a high-efficiency power saving type hybrid electric quality improving device capable of supplying normal power even when an image is formed.

In addition, according to the present invention, it is possible to provide a high-efficiency power saving hybrid electric quality improving device that protects electric power devices and prolongs their service life.

Further, according to the present invention, it is possible to provide a high-efficiency power saving hybrid electric quality improvement apparatus that improves power quality and reduces power cost.

In addition, according to the present invention, it is possible to provide a high-efficiency power saving hybrid electric quality improving apparatus that can be flexibly manufactured in single phase and three phases.

Fig. 1 is a circuit diagram and a vector diagram of the prior art 1. Fig.
2 is a circuit diagram and a vector diagram of the conventional art 2.
FIGS. 3A to 3C are high efficiency power saving hybrid electric quality improvement apparatus and voltage vector diagram according to a preferred embodiment of the present invention.
FIG. 4 is a diagram illustrating a high-efficiency power saving hybrid electric quality improvement apparatus and voltage vector diagram according to a preferred embodiment of the present invention when imaging occurs.
FIG. 5 is a power system diagram to which a high efficiency power saving hybrid electric quality improvement apparatus according to a preferred embodiment of the present invention is applied.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

FIGS. 3A to 3C are high efficiency power saving hybrid electric quality improvement apparatus and voltage vector diagram according to a preferred embodiment of the present invention.

3A to 3C, the high-efficiency power saving hybrid electric quality improving apparatus 100 includes a first leg 110, a second leg 120, A third leg 130 and a coil 150.

Here, the coil 150 includes a first winding 151 and a second winding 152.

The first winding 151 is wound on one end of the first leg 110, one end of the second leg 120, and one end of the third leg 130.

Here, the first winding 151 is a phase line R, S, T for connecting one end in a different phase and the other end is a neutral point M.

The second winding 152 is wound on the other end of the first leg 110, the other end of the second leg 120, and the other end of the third leg 130.

Here, the second winding 152 has one end connected to the neutral point M and the other end a neutral wire N. [

The first winding 151 is wound on the first leg 110 to the third leg 130 in parallel and the second winding 152 is wound on the first leg 110 in series. To the third leg (130).

One end of the second winding 152 connected to the neutral point M is wound on any one of the first leg 110 to the third leg 130 and is wound on two of the other in series.

The first winding 151 and the second winding 152 are coupled in a direction in which magnetic fluxes cancel each other.

Further, tabs may be provided between one end and the other end of each of the first winding 151 and the second winding 152 to draw power.

On the other hand, the high-efficiency power saving hybrid electric quality improvement apparatus 100 can be manufactured in a single-phase or three-phase structure flexibly because the connection configuration is simple.

3A to 3C, the harmonic elimination principle of the high efficiency power saving hybrid electric quality improvement apparatus 100 will be described. Phase-by-phase voltage from the phase lines R, S, T to the neutral line N is applied to the phase lines R, S, T) to the neutral point (M) and the voltage from the neutral point (M) to the neutral line (N) are synthesized as shown in Equation (1).

In equation _{1, V RH, V SH,} V TH is the voltage of the a voltage of the primary winding _{(151), V RH ',} V SH', V TH ' the second winding (152), V _RN, V _SN , and V _TN are phase-specific voltages (V _RN , V _SN , and V _TN are not shown in the drawings).

Since the first winding 151 and the second winding 152 are coupled to cancel magnetic fluxes, the voltage induced between the first winding 151 and the second winding 152 is V _RH '= -V _RH V _SH '= -V _SH , And V _TH '= -V _TH .

The phase-by-phase voltage from the phase lines R, S, T to the neutral line N may be set to a predetermined value, for example, when the magnetic fluxes of the first and second windings 151, The voltage induced in the first winding 151 and the voltage induced in the second winding 152 are synthesized at the neutral point M and are expressed by Equation (2).

If the combined voltage of the fundamental wave voltage and the harmonic voltage is applied to the phase lines R, S and T, the phase-by-phase voltage of the first winding 151 can be defined as Equation (3).

Here, V _m1, V _{m3, m5} V is the magnitude of the fundamental wave, a third harmonic, the fifth harmonic voltage.

Equation (3) is substituted into Equation (2), and the phase-to-phase voltage from the phase line (R, S, T) to the neutral line (N)

As can be seen from Equation (4), the third harmonic voltage V _m3 is zeroed and canceled by the phase voltage.

That is, the harmonic voltage induced in the first winding 151 and the harmonic voltage induced in the second winding 152 of the high-efficiency power saving hybrid electric quality improving apparatus 100 are synthesized at the neutral point M, do.

3A to 3C, an unbalanced voltage V _LM from the phase lines R, S and T to the neutral point M is calculated by the following equation And an unbalanced voltage V _MN from the neutral point M to the neutral line N are as shown in Equation 5: V _LM , V _MN No drawings).

The unbalanced voltage V _LN from the phase lines R to S to the neutral line N is a sum of the unbalanced voltage V _LM from the phase lines R to S to the neutral point M, Is the sum of the unbalanced voltage V _MN from the neutral point M to the neutral line N,

As can be seen from Equation (6), the unbalanced voltage (V _LN ) from the phase lines (R, S, T) to the neutral line (N) is canceled out.

That is, the unbalanced voltage induced in the first winding 151 and the unbalanced voltage induced in the second winding 152 of the high efficiency power saving hybrid electric quality improving apparatus 100 are synthesized at the neutral point M to be canceled and removed do.

Equation (7) is obtained by summarizing the relational expressions of Equations (2) and (5) by phase.

As can be seen from Equation (7), the voltage from the phase line (R, S, T) to the neutral line (N) is unbalanced at the voltage per phase from the phase line (R, S, T) to the neutral point (M) Respectively.

That is, an unbalanced voltage induced in the second winding 152 from a voltage induced in the first winding 151 of the high efficiency power saving hybrid electric quality improving apparatus 100 is synthesized at a neutral point M to form a balanced state .

The principles of the harmonic voltage cancellation principle and the unbalanced voltage improvement are described above using the voltage equations in Equations 1 to 7. The principle of harmonic current cancellation and the principle of unbalance current improvement are expressed in Equations 1 to m Since it can be explained through the same development process as in Equation 7, the development using the current equation is omitted.

FIG. 4 is a diagram illustrating a high-efficiency power saving hybrid electric quality improvement apparatus and voltage vector diagram according to a preferred embodiment of the present invention when imaging occurs.

Referring to FIG. 4, the principle of supply of the normal voltage to the high efficiency power saving hybrid electric quality improving apparatus 100 will be described below. The phase voltage from the phase lines R, S, T to the neutral line N is (8) "

The equation (8) can be summarized by phase.

As can be seen from Equation (9), the phase-by-phase voltage is compensated by synthesizing the voltages of the remaining phases except for the phase.

That is, the voltage induced in the first winding 151 and the voltage induced in the second winding 152 of the high efficiency power saving hybrid electric quality improving apparatus 100 are synthesized at the neutral point M and compensated.

When the voltage of each phase compensated in Equation (9) is substituted into Equation (2), the imaging voltage is compensated from the phase line (R, S, T) to the neutral line (N) Can be supplied.

In addition, since the principle of supplying the normal current when image formation occurs can be explained through the same developing process as in Equations (8) to (9), the development using the current equation is omitted.

FIG. 5 is a power system diagram to which a high efficiency power saving hybrid electric quality improvement apparatus according to a preferred embodiment of the present invention is applied.

5, harmonic currents generated by the use of a nonlinear load and the phase of the single-phase load and the three-phase load generated by the use of a non-linear load are applied to the phase lines R, S, T and the neutral line N of the power supply system 200 and the load system 300 And the unbalanced current generated due to the hybridization is synthesized and circulated.

When the high efficiency power saving type hybrid electric quality improvement apparatus 100 is installed between the power supply system 200 and the load system 300, the currents I _RH , I _SH , I _TH and the current I _NL flowing in the neutral line N flows into the high efficiency power saving hybrid electric quality improvement apparatus 100 and the harmonic current is removed by the harmonic elimination principle and the unbalance elimination principle, The unbalanced current operates in the direction of equilibrium.

In addition, the harmonic voltage and the unbalanced voltage are improved by the harmonic elimination principle and the unbalance elimination principle as described above.

As described above, the harmonics are removed by the high efficiency power saving hybrid electric quality improvement apparatus 100, and not only the operation is performed in a direction in which the unbalance is balanced, but also the power quality is improved And the power cost is reduced.
The present invention relates to a high-efficiency power saving hybrid electric quality improving apparatus, comprising: a power supply system having a three-phase power source of R phase, S phase and T phase and a neutral line (N phase) of a power supply system; (LOAD SYSTEM # 1, # 2) connected to the R phase, the S phase, the T phase and the neutral line (N phase), and any one of the R phase, S phase, Phase load (LOAD SYSTEM # 3, # 4, # 5) connected to the load side (N phase); A high efficiency power saving hybrid electric quality improving apparatus 100 connected to the R phase, the S phase, the T phase, and the neutral line (N phase); The high efficiency energy saving hybrid electric quality improvement apparatus 100 includes a first leg 110, a second leg 120, and a third leg 130 and a coil 150; The coil 150 is wound around one end of the first leg 110, one end of the second leg 120 and one end of the third leg 130, (151); And a second winding 152 wound around the other end of the first leg 110, the other end of the second leg 120 and the other end of the third leg 130, ); One end of the first winding 151 is connected to the R phase, S phase, and T, and one end of the first winding 151 is connected to the R phase, the S phase, and the T phase. And the other end of the first winding 151 is connected to the neutral point M; One end of the second winding 152 is connected to the neutral point M and the other end of the second winding 152 is connected to the neutral line N; The harmonic elimination, unbalance improvement, and phase open are generated through the connection of the first winding 151 and the second winding 152 of the high efficiency power saving hybrid electric quality improvement apparatus 100, Power hybrid type electric power quality improvement device.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the foregoing detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalents thereof are included in the scope of the present invention Should be interpreted.

100: High-efficiency power saving hybrid electric quality improvement device
110: first leg 120: second leg
130: third leg 150: coil
151: first winding 152: second winding
200: Power system 300: Load system
M: Neutral point N: Neutral line
R, S, T: phase line

Claims (2)

A high efficiency power saving hybrid electric quality improvement apparatus,
A power supply system 200 having a three-phase power source of R phase, S phase, and T phase, and a neutral line (N phase) of the power supply system;
Phase loads (LOAD SYSTEM # 1, # 2) connected to the R phase, the S phase, the T phase, and the neutral line (N phase)
A load system 300 having single-phase loads (LOAD SYSTEM # 3, # 4, # 5) connected to a specific (specific) phase and a neutral (N) phase among the R phase, S phase and T phase;
A high efficiency power saving hybrid electric quality improving apparatus 100 connected to the R phase, the S phase, the T phase, and the neutral line (N phase);
The high efficiency energy saving hybrid electric quality improvement apparatus 100 includes a first leg 110, a second leg 120, and a third leg 130 and a coil 150;
The coil 150 is wound around one end of the first leg 110, one end of the second leg 120 and one end of the third leg 130, (151); And
A second winding 152 wound on the other end of the first leg 110, the other end of the second leg 120, and the other end of the third leg 130, ;
One end of the first winding 151 is connected to the R phase, the S phase, and the T phase, and the other end of the first winding 151 is connected to the neutral point M;
One end of the second winding 152 is connected to the neutral point M and the other end of the second winding 152 is connected to the neutral line N;
V _RN , V _SN, and V _TN , which are voltages between the R phase, the S phase, the T phase, and the neutral line (N phase) are as shown in the following formula (A);

The first and second windings (151, 151) of the high efficiency power saving hybrid electric quality improvement apparatus (100)
Is capable of supplying normal power to the load system (300) even if phase opening occurs through connection of the high efficiency power saving hybrid electric quality improving device (152) A high efficiency power saving hybrid electric quality improvement apparatus,
A power supply system 200 having a three-phase power source of R phase, S phase, and T phase, and a neutral line (N phase) of the power supply system;
Phase loads (LOAD SYSTEM # 1, # 2) connected to the R phase, the S phase, the T phase, and the neutral line (N phase)
A load system 300 having single-phase loads (LOAD SYSTEM # 3, # 4, # 5) connected to a specific (specific) phase and a neutral (N) phase among the R phase, S phase and T phase;
A high efficiency power saving hybrid electric quality improving apparatus 100 connected to the R phase, the S phase, the T phase, and the neutral line (N phase);
The high efficiency energy saving hybrid electric quality improvement apparatus 100 includes a first leg 110, a second leg 120, and a third leg 130 and a coil 150;
The coil 150 is wound around one end of the first leg 110, one end of the second leg 120 and one end of the third leg 130, (151); And
A second winding 152 wound on the other end of the first leg 110, the other end of the second leg 120, and the other end of the third leg 130, ;
One end of the first winding 151 is connected to the R phase, the S phase, and the T phase, and the other end of the first winding 151 is connected to the neutral point M;
One end of the second winding 152 is connected to the neutral point M and the other end of the second winding 152 is connected to the neutral line N;
V _RN , V _SN, and V _TN , which are voltages between the R phase, the S phase, the T phase, and the neutral line (N phase) are as shown in the following formula (A);

The harmonic voltage can be removed by equation (B) through the connection of the first winding 151 and the second winding 152 of the high efficiency power saving hybrid electric quality improvement apparatus 100;

Wherein the high-efficiency power saving hybrid electric quality improvement apparatus (100) is capable of supplying normal power to the load system (300) even when phase harmonics are removed and phase open occurs,

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